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<?php

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/**

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* ResponsiveEmbeds.php

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* @package Embera

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* @author Michael Pratt <yo@michael-pratt.com>

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* @link http://www.michael-pratt.com/

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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namespace Embera\Html;

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/**

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* Class Responsable of converting html into responsive html.

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class ResponsiveEmbeds

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{

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/**

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* Attempts to transform the html key of the response

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* with a responsive alternative.

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* @param array $response

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* @return array

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public function transform(array $response)

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{

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if (!empty($response['html']) && isset($response['embera_provider_name'], $response['type'])) {

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$response['html_pre_responsive'] = $response['html'];

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$response['html'] = $this->removeWidthHeightAttributes($response['html']);

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$response['html'] = $this->removeWidthHeightStyles($response['html']);

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$response['html'] = $this->addClasses($response['html'], strtolower($response['type']));

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$response['html'] = $this->wrapInsideDiv($response['html'], strtolower($response['type']), $response['embera_provider_name']);

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}

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return $response;

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}

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/**

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* Removes the Width and Height attributes from a tag

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* @param string $text

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* @return string

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protected function removeWidthHeightAttributes($text)

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{

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return preg_replace('~(width|height)="\d*"\s~i', '', $text);

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}

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/**

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* Removes the Width/Height from inline styles

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* @param string $text

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* @return string

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protected function removeWidthHeightStyles($text)

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{

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return preg_replace('~(width|height|max-width|max-height):[0-9 ]+[a-z]{2};?~i', '',$text);

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}

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/**

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* Adds item classes to an html tag

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* @param string $text

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* @param string $type

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* @return string

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protected function addClasses($text, $type)

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{

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$class= 'embera-embed-responsive-item embera-embed-responsive-item-' . $type;

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if (preg_match('~class="(.+?)"~i', $text)) {

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return preg_replace('~class="(.+?)"~i', 'class="$1 ' . $class . '"', $text);

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}

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foreach (['iframe', 'img'] as $tag) {

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if (preg_match('~<' . $tag . '~i', $text)) {

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return str_ireplace('<' . $tag, '<' . $tag . ' class="' . $class . '"', $text);

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}

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}

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return $text;

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}

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/**

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* Wraps the whole html inside a new div with custom attributes.

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* @param string $text

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* @param string $type

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* @param string $providerName

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* @return string

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protected function wrapInsideDiv($text, $type, $providerName)

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{

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$providerName = strtolower($providerName);

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return '<div class="embera-embed-responsive embera-embed-responsive-' . $type . ' embera-embed-responsive-provider-' . $providerName . '">' . $text . '</div>';

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}

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}

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